International Business Machines Corporation

Globalfoundries Inc.

Charles Scott Graham

Timothy J Schimke

Jesse Paul Arroyo

Prathima Kommineni

Daniel Frank Moertl

John Ronald Oberly, Iii

Kyle Alan Lucke

Gregory Michael Nordstrom

Harvey Gene Kiel

Jaya Srikrishnan

Chetan Mehta

Paul Edward Movall

Shawn Michael Lambeth

Andrew T Koch

Colin Robert DeVilbiss

Lee Anton Sendelbach

Thomas R Sand

Manu Anand

Renato John Recio

Ronald Leroy Billau

James Brian Cunningham

Bryan Mark Logan

Michael Joseph Carnevale

Steven Edward Royer

Nicholas J Rogness

William Joseph Armstrong

Randal Craig Swanberg

Daniel Gene Eisenhauer

Gary Dean Anderson

Narsimha Reddy Challa

David Charles Boutcher

Kristopher Craig Whitney

Naresh Nayar

Adalberto Guillermo Yanes

Joefon Jann

Brent William Jacobs

Adam Thomas Stallman

Jeffrey William Palm

Sean Thomas Brownlow

Paul Gregory Crumley

Swaroop Jayanthi

Ping Chen

Ching-Farn Eric Wu

James Aloysius Donnelly

Mark Edward Fisher

Colin R DeVilbiss

Daniel J Larson

Juan J Alvarez

Sailaja R Keshireddy

Carol T Machuca

Patricia Y Wang

Danny Marvin Neal

Omar Cardona

Vivek Kashyap

Kevin James Wendzel

Baltazar De Leon, Iii

Curtis Shannon Eide

Ellen Marie Bauman

Jeffrey James Lynch

Travis James Pizel

Yiwei Li

Michal Ostrowski

Adam Charles Lange-Pearson

Sandy K Kao

Rama K Hazari

Daniel Robert Lipps

Sakethan R Kotta

Kumaraswamy Sripathy

Robert John Manulik

David Lee Dosch

Brian Gerard Holthaus

Brian James King

Gene Steven Van Grinsven

Daniel Paul Wetzel

Mark Gregory Manges

Naresh Nayer

Raghavendra Malapati

Kris Marie Kendall

William Joseph Armstrong, Jr

Thomas K Pokrandt

Patrick A Barrett

Lee Anton Sendelback

Venu G Potluri

Paul John Johnsen

Jason Alan Clegg

Kevin Dale Jones

Swathi M Bhattiprolu

Nuthula Venkatesh

Automated dynamic load balancing across VNIC fast switchover devices including monitoring, by a resource monitor, resource utilization metrics of at least one resource used to send data along a first communications path through a hypervisor; in response to detecting, by the resource monitor based on the resource utilization metrics, that the at least one resource crosses a resource utilization threshold, sending a notification to a rebalancer, wherein the notification comprises a subset of the resource utilization metrics; generating, by the rebalancer based on the subset of the resource utilization metrics, a resource optimized mapping for the at least one resource used to send data along the first communications path; and issuing, by the rebalancer, the resource optimized mapping to the hypervisor, wherein the hypervisor reconfigures, based on the resource optimized mapping, the at least one resource used to send data along the first communications path.

Automated dynamic load balancing across virtual network interface controller fast switchover devices using a rebalancer

Managing flexible adapter configurations in a computer system including assigning an initial amount of resources to a set of empty expansion bus slots of the computer system; detecting an adapter has been attached to one of the set of empty expansion bus slots; receiving, by a hypervisor, a request for additional resources for use by the detected adapter, wherein the additional resources are in addition to the initial amount of resources assigned to the expansion bus slot occupied by the detected adapter; determining, by the hypervisor, an availability of the additional resources for the detected adapter; in response to determining that the additional resources are available for the detected adapter, assigning, by the hypervisor at runtime, the requested additional resources to the detected adapter.

Managing by a hypervisor flexible adapter configurations and resources in a computer system

Dynamic I/O translation table allocation for SR-IOV enabled I/O adapters including receiving an instruction to transition the SR-IOV adapter to shared mode; determining, using a configuration file for the SR-IOV adapter, memory requirements for an I/O translation table; comparing the memory requirements for the I/O translation table to memory currently allocated for use by the SR-IOV adapter; based on the comparing the memory requirements for the I/O translation table to the memory currently allocated for use by the SR-IOV adapter, determining that the memory currently allocated for use by the SR-IOV adapter is insufficient to store the I/O translation table and determining an additional amount of memory required to store the I/O translation table; and allocating, at runtime, the additional amount of memory for storing the I/O translation table.

Dynamic I/O translation table allocation for single root input output virtualization enabled I/O adapters

Live partition mobility in a computing environment that includes a source system and a target system may be carried out by: pausing a logical partition on the source system, wherein the logical partition is mapped to an I/O adapter of the source system; copying, to the target system, configuration information describing the mapping of the logical partition to the I/O adapter; copying, to the target system, the logical partition of the source system; placing an I/O adapter of the target system into an error state; mapping, in dependence upon the configuration information, the logical partition of the target system to the I/O adapter of the target system; placing the I/O adapter of the target system into an error recovery state; and resuming the logical partition on the target system.

Live partition mobility with I/O migration

The present disclosure relates to sharing an I/O device across multiple virtual machines. According to one embodiment, a computing system configures shared ownership of the I/O device between a first partition and one or more of the plurality of virtual machines. The computing system transfers partial ownership of the I/O device from the first partition to the one or more virtual machines and generates device configuration information for the I/O device. The virtual machines can use the generated device configuration information to access and configure the I/O device. Once the I/O device is configured for shared ownership, the computing system boots the one or more virtual machines.

Sharing ownership of an input/output device using a device driver partition

The present invention provides computer implemented method, system, and computer program product of switching servers without interrupting a client command-response queue. In an embodiment, the present invention includes selecting standby computer server systems, connecting a CRQ of a client computer system to a previous active computer server system and to the selected standby computer server systems, transmitting setup commands to the selected standby computer server systems, communicating data with the previous active computer server system via at least one sub-CRQ, communicating management commands with the previous active computer server system and the selected standby computer server systems via the CRQ, receiving a notification that a switchover has occurred, redirecting the CRQ to one of the selected standby computer server systems, in response to the redirecting, communicating data with a new active computer server system via at least one sub-CRQ, and sending new setup commands to the new computer server system.

Switching servers without interrupting a client command-response queue

Failover of a virtual function exposed by an SR-IOV adapter of a computing system, including: instantiating, by a hypervisor, a standby virtual function in the computing system; detecting a loss of communication between a logical partition and an active virtual function mapped to the logical partition; placing the active virtual function and the standby virtual function in an error state; remapping the logical partition to the standby virtual function; and placing the standby virtual function in an error recovery state.

Failover of a virtual function exposed by an SR-IOV adapter

Automated dynamic load balancing across virtual network interface controller fast switchover devices

Migrating a logical partition with a native logical port including establishing in the target computing system a target VIOS that includes a virtual network interface controller (vNIC) server, the vNIC server of the target VIOS coupled for data communications to a first target virtual adapter; copying the logical partition including a vNIC client to the target computing system; starting the logical partition; establishing, by the vNIC client of the logical partition, data communications with the vNIC server of the target VIOS, including performing I/O data communications between the logical partition and the first target virtual adapter; establishing a second logical port in the logical partition on the target computing system, including coupling for I/O data communications the second logical port to a second target virtual adapter; and performing I/O data communications from the logical partition to the second target virtual adapter through the second logical port.

Migrating a logical partition with a native logical port

Migrating interrupts from a source I/O adapter of a computing system to a destination I/O adapter of the computing system, includes: collecting, by a hypervisor of the computing system, interrupt mapping information, where the hypervisor supports operation of a logical partition executing and the logical partition is configured to receive interrupts from the source I/O adapter; configuring, by the hypervisor, the destination I/O adapter with the interrupt mapping information collected by the hypervisor; placing, by the hypervisor, the destination I/O adapter and the source I/O in an error state; deconfiguring the source I/O adapter from the logical partition; and enabling the logical partition and destination I/O adapter to recover from the error state.

Migrating interrupts from a source I/O adapter of a computing system to a destination I/O adapter of the computing system

Systems, methods, and computer program products to perform an operation comprising executing a device driver in a private logical partition on a compute host, wherein the device driver is configured to execute in an environment different than an environment of a hypervisor of the compute host, establishing a communication channel between the private logical partition and an adjunct partition executing on the compute host, and configuring, responsive to a command sent by the adjunct partition to the device driver via the communication channel, a physical function of a single root I/O virtualization (SR-IOV) device of the host system.

Extending trusted hypervisor functions with existing device drivers

A method to manage peripheral component interconnect (PCI) memory includes accessing a page table that includes mapped data representing base address register (BAR) space and addresses of PCI devices. The method also includes determining whether a requested address of a PCI device has a corresponding entry in the page table. The method further includes invoking a hypervisor to perform a memory operation to obtain address information of the PCI device upon determining that the requested address does not have the corresponding entry in the page table.

Using hypervisor for PCI device memory mapping

Migrating memory MMIO from a source I/O adapter of a source computing system to a destination I/O adapter of a destination computing system, includes: collecting, by a source hypervisor of the source computing system, MMIO mapping information, where the source hypervisor supports a logical partition on the source computing system and the logical partition is configured for MMIO operations with the source I/O adapter through an MMU; placing, by a destination hypervisor of the destination computing system, the destination I/O adapter in an error state; migrating the logical partition from the source computing system to the destination computing system; configuring, by the destination hypervisor of the destination computing system, the destination computing system for MMIO with the LPAR utilizing the MMIO mapping information collected by the source hypervisor; and restarting the logical partition on the destination computing system, including recovering, by the logical partition, from the error state.

Migrating MMIO from a source I/O adapter of a source computing system to a destination I/O adapter of a destination computing system

Growing community of inventors

Rochester, MN, United States of America

Charles Scott Graham